1 /*============================================================================= 2 Copyright (c) 2001-2014 Joel de Guzman 3 Copyright (c) 2001-2011 Hartmut Kaiser 4 Copyright (c) 2013 Agustin Berge 5 6 Distributed under the Boost Software License, Version 1.0. (See accompanying 7 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 8 =============================================================================*/ 9 #if !defined(SPIRIT_NO_SKIP_JAN_16_2010_0802PM) 10 #define SPIRIT_NO_SKIP_JAN_16_2010_0802PM 11 12 #include <boost/spirit/home/x3/support/context.hpp> 13 #include <boost/spirit/home/x3/support/unused.hpp> 14 #include <boost/spirit/home/x3/core/skip_over.hpp> 15 #include <boost/spirit/home/x3/core/parser.hpp> 16 #include <boost/type_traits/remove_reference.hpp> 17 #include <boost/utility/enable_if.hpp> 18 19 namespace boost { namespace spirit { namespace x3 20 { 21 // same as lexeme[], but does not pre-skip 22 template <typename Subject> 23 struct no_skip_directive : unary_parser<Subject, no_skip_directive<Subject>> 24 { 25 typedef unary_parser<Subject, no_skip_directive<Subject> > base_type; 26 static bool const is_pass_through_unary = true; 27 static bool const handles_container = Subject::handles_container; 28 no_skip_directiveboost::spirit::x3::no_skip_directive29 no_skip_directive(Subject const& subject) 30 : base_type(subject) {} 31 32 template <typename Iterator, typename Context 33 , typename RContext, typename Attribute> 34 typename enable_if<has_skipper<Context>, bool>::type parseboost::spirit::x3::no_skip_directive35 parse(Iterator& first, Iterator const& last 36 , Context const& context, RContext& rcontext, Attribute& attr) const 37 { 38 auto const& skipper = x3::get<skipper_tag>(context); 39 40 typedef unused_skipper< 41 typename remove_reference<decltype(skipper)>::type> 42 unused_skipper_type; 43 unused_skipper_type unused_skipper(skipper); 44 45 return this->subject.parse( 46 first, last 47 , make_context<skipper_tag>(unused_skipper, context) 48 , rcontext 49 , attr); 50 } 51 template <typename Iterator, typename Context 52 , typename RContext, typename Attribute> 53 typename disable_if<has_skipper<Context>, bool>::type parseboost::spirit::x3::no_skip_directive54 parse(Iterator& first, Iterator const& last 55 , Context const& context, RContext& rcontext, Attribute& attr) const 56 { 57 return this->subject.parse( 58 first, last 59 , context 60 , rcontext 61 , attr); 62 } 63 }; 64 65 struct no_skip_gen 66 { 67 template <typename Subject> 68 no_skip_directive<typename extension::as_parser<Subject>::value_type> operator []boost::spirit::x3::no_skip_gen69 operator[](Subject const& subject) const 70 { 71 return { as_parser(subject) }; 72 } 73 }; 74 75 auto const no_skip = no_skip_gen{}; 76 }}} 77 78 #endif 79